The first courts were held in Jamestown, which remained the seat of justice until the move to Lebanon.

An act of the Legislature on January 21, 1832, provided commissioners to relocate the County Seat to Lebanon. As the first Courthouse was completed in 1833, it is presumed that the formal transfer of the County Seat occurred that year.

Lebanon was laid out in 1832 and the first settler was A. H. Longley. By 1849 it contained eighty dwelling houses, four of brick and 76 frame, with a population of 500.

Jamestown, by 1849, contained about thirty houses and had a population of 150.

The present Courthouse, which was completed and dedicated July 4, 1912, is built of Bedford limestone and one of the features is the dome, which is the second in size in the state, being fifty feet in diameter. The north and south entrances are each adorned by four columns 35 feet 3 inches in length, 52 inches in diameter at the base and 48 inches at the tip. These columns were said to be [in 1915] the largest one-piece columns in the United States.

According to the Society of Indiana Pioneers, an individual was a pioneer of our county if they resided here on or before December 31, 1835.

Indiana automobile License Plates issued in Boone County start with the prefix 6 because it is the sixth county in alphabetical listing.